Enables protein domain specific binding activity. Involved in several processes, including cytoplasmic microtubule organization; negative regulation of Rac protein signal transduction; and regulation of GTPase activity. Acts upstream of or within blastocyst hatching. Located in cytoplasm. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; sensory organ; and skeleton. Orthologous to human STMN3 (stathmin 3). [provided by Alliance of Genome Resources, Apr 2022]